Artist Neil Harbisson was born completely color blind and sees the world in grayscale. But even though Neil can't see color doesn't mean he can't sense it. That's because Neil Harbisson is a cyborg who can hear color.

In 2004, Neil convinced a doctor to implant into his skull an antenna that detects and transposes colors into corresponding tones — allowing him to hear color through bone conduction. He considers it a new body part.

"This is an implant, so it's permanently attached," Neil says. "There's no way of removing it."